Buff construction



Sept. 20, 1938.' l.. w. KRL-:lLlcK ET An.

BUFF CONSTRUCT I ON Filed Sept. l5, 1937 u ullVlllll y Patented' Sept. 20', '1938 UNITE ST'E'ES BUFF CONSTRUCTION Application September 15, 1937, Serial No. 163,932

2 Claims.

This invention relates to buiilng wheel elements and their assembly. Y

This inventionr has utility when incorporated in disks of woven fabric, stitch assembled, es-

5 pecially for combined utilities over widened ranges in grinding, or hard wheel operations, burnishing and polishing, or so-called loose buff operations.

Referring to the drawing:

Fig. 1 is a side view of a buffing section having an annularly complete stitched or hard portion and a central loose buff portion;

Fig. 2 is a side view of a builing section having the stitched or hard portion annularly incomplete, being quartered by intersecting direction loose or vent strips;

Fig. 3 is a side view of a bumng section having the stitched or hard portion annularly incomplete, quartered by loose or vent strips outward from a central loose buif portion;

Fig. 4 is a side view of a bufiing sectionl of the generalv type of Fig. 2, with transverse ports to supplement ventilation at the strips radially outward;

Fig. 5 is a fragmentary view of la buiilng section of the general type of Fig. 3, with ventilation promotion ports near the junction of the loose .bui with the radial strips; and

Fig. 6 is a fragmentary diagrammatic showing of the buing sections assembled as a wheel on a bufflng jack, with bladed ventilationmeans between the sections.

Warp and woof fabric disks I have the successive plis angularly offset (Fig. 5) as stitch assembled into a section. Criss-cross buil' compacting stitching 2, (Fig. 1) provides an annularly complete hard buff section having successively opening pockets 3, 4, 5, as the disk lsworn to decreasing diameter in operation. The practice for wear down of a hard buff initially of say l2" to 16" diameter when reduced to say 8" diameter, is not generally usable for further diameter reduction.

A factor of importance in the disclosure herein is retention of value for the 8" diameter buff as brought to such dimension reduction by wearing down in use. By leaving unstitched region 6 radially inward as a minor disk area there results a loose buff cushioning center providing a resil` stitched area, with requirement of less thread, has contributed a material percentage of polishing cloth for value in the polishing or loose buff range of operations.

Hard stitching 8, say as criss-cross (Fig. 2), is 5 a working zone and may be of approximately full radial extent to the stitching 1, but herein quartered against annular continuity by unstitched strips 9 as loose buff radially extending channel portions, softening the cushioning section unit against peripheral rigidity. The unstitched strip 9, besides its looseness attribute, has vent properties incidental thereto, a factor against excessive temperature rise in buiing operations.

Central loose buff portion I0 (Fig. 3) has radi- 15 ally therefrom unstitched strips II, separating criss-cross stitched portions I2, isolated from the soft or loose portion III, by arc stitching I3. The

-ventilation advantage in the dual form buf! is here present.

Ports or openings I 4 (Fig. 4) directly through a bufiing section are effective to supplement ventilation effectiveness of the unstitched radial strips 9. 'Ihese ports are preferably located sufilciently inward as not to be disturbed in the func- 25 tion of the bufng wheel as a hard buil?.

Ports I5 (Fig. 5) in the dual purpose buillng section, may be located at the region of demarcation hard to loose buff, and thereby not in practice interfere with the full peripheral use of the 30 hard builf to the loose buil' diameter and direct of the loose buff therefrom.

'I'he respective sections have central hub openings IG through which may extend shaft I 8 mounted in bearing I9 and extending there- 35 through to carry pulley 20 driven by belt 2l in operating the builing jack. The buillng wheel comprises a plurality of sections 2| having ports I5 of the respective sections in register. 'I'he sections 2I are spaced by blades 22 on spacer means 40 between the sections 2l. Hub disks 23, 24, are in such compressing assembly for the sections 2| eected -by the nut 25, that the peripheral portions of ,the sections overhang the blade into 45 wheel peripheral completeness.Y

Buff life increase, bui operation effectiveness in the varied different ranges for performance, have these values further supplemented by the ventilation properties incidental to the build-up 5() What is claimed and it is desired to secure by unitary structure, a plurality oi' rows of com- United States Letters Patent is: i pacting stitching applied to an vouter annular 1. A builing wheel comprising a lplurality of working zone in groups in the form of lannular disks of woven fabric united tovform a unitary sectors which are spaced apart by unstitched 5 structure, a plurality of rows of stitching applied channels connecting to an unstitched central pori to an outer annular working portion to compact tion of considerable extent, the unstitched cenand 'strengthen said working portion, lan inner tral portion being loose in nature and forming a portion between the centre of the disks and the `resilient cushioning support for the working zone annular working portion being unstltched and and the unstitcned channels extending from the i@ loose in nature and of such an extent as to form unstitched central portion to the periphery l0 a resilient support for the workingportion. affording Ventilating channels. 2. A cushioned and Ventilated bu comprising., l LESTER W. mmm. a plurality of woven fabric disks united to form a I'ERBERT R. TAYLOR. 

